LG G2 vs Samsung Galaxy S4

LG G2 Specs

• Display: 5.2 inch HD IPS panel at 1080x1920(434 ppi) Protected by Corning Gorilla Glass 3.
• Dimensions: 138.5 x 70.9 x 8.9mm
• Weight: 143g
• CPU: Quad-core 2.3 Ghz Krait 400
• GPU: Adreno 330
• Chipset: Snapdragon 800
• RAM: 2GB
• OS: Android 4.2.2 Jelly Bean
• Storage Options: 16/32/GB, Micro SD card slot( region dependent)
• Camera (Primary): 13 MP auto-focus optically stabilized, 8X digital zoom, face detection, HDR mode, and panorama, geo-tagging. 1080p at 60fps( I like!!!) 
• Camera (Secondary): 2.1 MP full HD video capable.
• Connectivity: Dual-band Wifi a/b/g/n/ac, Wifi Hotspot, Bluetooth 4.0 LE, micro USB port with MHL(Mobile High-Definition Link) USB Host, GPS receiver with A-GPS, GLONASS( Global Navigation Satellite System) NFC(Near Field Communications) Miracast Protocol( wireless screen sharing)
• Battery Capacity: 3000mAh Li-Po unit (2610mAh region dependent)

Samsung Galaxy S4

• Display: 5 inch Super AMOLED at 1080x1920
• Dimensions: 136.6 x 69.8 x 7.9mm
• Weight: 130g
• CPU: Quad Core 1.6 Ghz Cortex-A15 & Quad Core 1.2 GHz Cortex-A7
• GPU: PowerVR SGX 544MP3
• Chipset: Exynos 5 Octa 5410
• RAM: 2GB
• OS: Android 4.2.2 Jelly Bean
• Storage Options: 16/32/64GB, micro SD support up to 64GB
• Camera (Primary): 13 MP, auto focus, LED flash, Dual Shot, Geo Tagging, Fce and smile detection, image stabilization, HDR, 1080p video recording @30fp
• Camera (Secondary): 2 MP, 1080p video recording @30fps
• Connectivity: Dual band Wifi 802.11 a/b/g/n/ac,WiFi Hotspot, DLNA(Digital Living Network Alliance), Wifi Direct, Bluetooth v4.0 with A2DP(Advanced Audio Distribution Profile), EDR(Enhanced Data Rate), LE(Low Energy), NFC,microUSB v2.0 (MHL 2), USB On-the-go,GPS with A-GPS support and GLONASS
• Battery Capacity: Li-Ion 2600 mAh batter

Note: Both devices have quad band 2G Radios @850 / 900 / 1800 / 1900, 3G HSDPA @850/900/1900/2100. Samsung Galaxy S4 4G capabilities are market dependent meaning only select regions get 4G LTE variants.

LG G2 supports 4G LTE on the following bands:900/1800/2100/2600/850. The G2 also supports LTE Advanced